package luanvan.app.foodnote.library;

import java.util.HashMap;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DatabaseHandler extends SQLiteOpenHelper {
	
	private static final int DATABASE_VERSION = 1;
	
	private static final String DATABASE_NAME = "foodnote.db";
	
	private static final String TABLE_LOGIN = "users";
	
	private static final String KEY_ID = "id";
	private static final String KEY_NAME = "name";
	private static final String KEY_EMAIL = "email";
	private static final String KEY_UID = "uid";

	public DatabaseHandler(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		String CREATE_LOGIN_TABLE = "CREATE TABLE " + TABLE_LOGIN + "("
				+ KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
				+ KEY_NAME + " TEXT,"
				+ KEY_EMAIL + " TEXT UNIQUE," 
				+ KEY_UID + " TEXT" + ")";
		db.execSQL(CREATE_LOGIN_TABLE);
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		db.execSQL("DROP TABLE IF EXISTS " + TABLE_LOGIN);
		onCreate(db);
	}

	public void addUser(String name, String email, String uid){
		SQLiteDatabase db = this.getWritableDatabase();
		ContentValues values = new ContentValues();
		values.put(KEY_NAME, name);
		values.put(KEY_EMAIL, email);
		values.put(KEY_UID, uid);
		
		db.insert(TABLE_LOGIN, null, values);
		db.close();
	}
	/**
	 * Get user data from database
	 */
	public HashMap<String, String> getUserDetails(){
		HashMap<String, String> user = new HashMap<String, String>();
		String selectQuery = "SELECT * FROM " + TABLE_LOGIN;
		
		SQLiteDatabase db = this.getReadableDatabase();
		Cursor cursor = db.rawQuery(selectQuery, null);
		// Move to first row
		cursor.moveToFirst();
		if(cursor.getCount() > 0) {
			user.put(KEY_NAME, cursor.getString(1));
			user.put(KEY_EMAIL, cursor.getString(2));
			user.put(KEY_UID, cursor.getString(3));
		}
		cursor.close();
		db.close();
		return user;
	}
	/**
	 * Getting user login status
	 * return true if row is there in table
	 */
	public int getRowCount(){
		String countQuery = "SELECT * FROM " + TABLE_LOGIN;
		SQLiteDatabase db = this.getReadableDatabase();
		Cursor cursor = db.rawQuery(countQuery, null);
		int rowCount = cursor.getCount();
		db.close();
		cursor.close();
		return rowCount;
	}
	
	/**
	 * Re crate database
	 * Delete all tables and create them again
	 */
	public void resetTables(){
		SQLiteDatabase db = this.getWritableDatabase();
		db.delete(TABLE_LOGIN, null, null);
		db.close();
	}
}
